How to update Storyline 3 to the latest version?

TL;DR: Can someone help me arrive at a solution as to how I can update Storyline 3 to the latest version through the Articulate desktop app?

Issue:

• I am currently using Storyline v. 3.51.24979.0
• I found online that the latest version of Storyline is c. 3.85.xxx
• I need to get my version up to date, however, I cannot find any "Update" feature within Storyline or the stand-alone Articulate Desktop app.

Troubleshooting 1:

I opened the Articulate desktop app > Clicked the down arrow beside my profile icon and clicked on "Check for Updates" (image below). 

When I click this... an animated ellipse flashes[...] for less than one second, and then disappears. And that is that. There's no message saying, "Your versions are all up to date." or... "You should update the following app(s)"

Troubleshooting 2:

I found online how one can check for updates within the Storyline app, on the Help section of the ribbon.  So, I opened the Storyline application and went to Help. There is an "About" section that allows me to view which version I have. But there is not "Check for updates" button anymore. I imagine removing this button was a change made in a previous button. 

Troubleshooting 3:

I found this article online through the Articulate website. It is titled: How to Install and Update Storyline 3.  It seemed like I'd finally figured this all out. However... this involves me downloading an executable file (.exe) and running it as an Administrator... etc. I work for a large company with a very strict IT staff. I cannot run .exe files on my work computer, and I cannot run anything as an administrator.  I would have to take my laptop to IT, leave it with them, and have them run the update(s). This is kind of the reason why companies like Adobe and Articulate came up with these standalone desktop apps, so users can update the individual apps without having to constantly manually download and run .exe files to update the individual apps. 

Main Question:

Can someone help me arrive at a solution as to why I cannot update Storyline through the Articulate Desktop app?